Assessment of creep interaction of double elliptical cracks at elevated temperatures using numerical analysis
Assessment of creep interaction of double elliptical cracks at elevated temperatures using numerical analysis
复制标题
使用数值分析评估高温下双椭圆裂纹的蠕变相互作用
DOI：
10.1007/s00419-017-1335-9
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发表时间：
2018-05
影响因子：
2.8
通讯作者：
Xu LY
中科院分区：
文献类型：
--
作者：
Zhao Lei;Zhao Zunyi;Xu Lianyong;Han Yongdian;Jing Hongyang;Zhao Lei;Zhao Zunyi;Xu Lianyong;Han Yongdian;Jing Hongyang;Xu LY;Xu LY
多条裂纹的相互作用和组合会加速裂纹的扩展，缩短构件的寿命。在这项研究中，多个嵌入裂纹的相互作用在一个有限厚度的板进行远程拉伸载荷在蠕变制度进行了研究，使用全面的有限元计算。此外，裂纹和材料特性的特征（例如，考虑了裂纹长径比σ/c、相对裂纹深度σ/t、相对裂纹间距σ/c和蠕变硬化指数n。结果表明，蠕变相关系数沿裂纹前缘沿着呈不对称分布。蠕变交互作用系数随裂纹深度和蠕变硬化指数的增大而增大，随裂纹深度和蠕变硬化指数的增大而减小。而裂纹形状由椭圆形变为圆形对裂纹扩展影响不大。在综合分析的基础上，提出了考虑裂纹形态和材料特性的高温下埋置裂纹多重相互作用水平的经验公式。
The interaction and combination of multiple embedded cracks would accelerate cracks growth and shortened the components life. In this study, the interaction of the multiple embedded cracks in a finite thickness plate subjected to remote tensile loading in the creep regime was investigated using comprehensive finite element calculations. In addition, the features of cracks and material properties (e.g., crack aspect ratiosa/c, relative crack deptha/t, relative distances/cand creep hardening exponentn) were considered. The results revealed that the creep interaction factor distribution was asymmetric along the crack front. In addition, the creep interaction factor increased as the crack depth and creep hardening exponent increased and gradually decreased as the position away from the each other. However, the crack shape changing from elliptical shape to circular shape had slight impact. Furthermore, based on the comprehensive analyses, an empirical formula to determine the multiple interaction level considering the crack configurations and the material properties was proposed for the embedded cracks operating at elevated temperatures.
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使用与载荷无关的约束参数 Q 量化蠕变裂纹尖端约束效应
影响因子：
7.3
作者：
Xu Lianyong;Zhang Xingfu;Zhao Lei;Han Yongdian;Jing Hongyang;Xu Lianyong;Zhang Xingfu;Zhao Lei;Han Yongdian;Jing Hongyang;Zhao L
通讯作者：
Zhao L
影响因子：
2.8
作者：
Iryna I. Mykhailova;O. Menshykov;I. Guz
通讯作者：
Iryna I. Mykhailova;O. Menshykov;I. Guz
DOI：
10.1520/stp33943s
发表时间：
1976
期刊：
ASTM special technical publications
影响因子：
--
作者：
J. Landes;J. Begley
通讯作者：
J. Landes;J. Begley
DOI：
10.1115/1.482794
发表时间：
2000-07
影响因子：
1.2
作者：
R. Viswanathan;J. Stringer
通讯作者：
R. Viswanathan;J. Stringer
影响因子：
5.3
作者：
Rhys Jones;D. Peng;S. Pitt
通讯作者：
Rhys Jones;D. Peng;S. Pitt